SSL in the admin panel is something I implemented after testing it myself, but only some users can get it to work. I imagine this is due to different hosting environments and WordPress version & plugin variations.

Basically, this feature needs some polishing. If you could let me test the plugin on your server, either on your site or a blank WordPress installation, that would be greatly appreciated.

If not, that's fine too, I just won't be able to offer much more help. :)